US PATENT SUBCLASS 137 / 424
.~.~ With counter-balance

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


137 /   HD   FLUID HANDLING

386  DF  LIQUID LEVEL RESPONSIVE OR MAINTAINING SYSTEMS {11}
409  DF  .~ By float controlled valve {11}
424.~.~ With counter-balance {1}
425  DF  .~.~.~> Within tank

DEFINITION

Classification: 137/424

(under subclass 409) Apparatus in which the float is provided with means to apply a force which at least partially counterbalances the weight of the float and valve assembly or which partially counterbalances the buoyancy of the float.

SEE OR SEARCH THIS CLASS, SUBCLASS:

419, for quick acting float valves having an over center mechanism with a shifting weight.